#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
void cube(double n);
int main(void)
{
	double i = 0;
	scanf("%lf", &i);
	
	cube(i);

	return 0;
}
void cube(double n)
{
	n = n * n * n;
	printf("%lf", n);
}
